Electric burglar-alarm system.



J. P. WILLIAMS. ELECTRIC BURGLAR- ALARM SYSTEM.

APPLIGATION FILED JUEE 1, 1910.

Patented 001;. 20 1914.

a ATTORNEY.

ltl

UNITED STATES PfILFENT OFFICE.

JOHN PRITCHARD WILLIAMS, OF NEW YbRK, N. Y., ASSIGNOR TO ELECTRIC BANKPROTECTION COMPANY, A CORPORATION OF DELAWARE.

ELECTRIC BURGLAR-ALABM SYSTEM.

Specification of Letters Patent.

Patented Oct. 20, 191 4.

To all whom 1' 6 may concern Be it known that I. Jon) I. humans, acitizen of the United States, and resident of New York, in the countyand State of New York, have invented certain new and useful Improvementsin Electric Burglar- Alarm Systems, of which the following is aspecification.

This invention relates to electric burglaralarm systems, and it hasparticular relation to improved means whereby access to the guardedstructure will be permitted to authorized persons without sounding thealarm, and to other protective features comprised in the operativestatus of such systems, substantially as hereinafter described.

A time mechanism of the eha 'acter above set forth is shown in thepatent to M. F. Juruiek, Serial No. 944,733, granted December 28, 1909.

Considerable disadvantage and risk attend the employment of controllingtime mechanisms inclosed within the guarded structure and in connectionwith the electrical protective alarm system thereof, for governing! theoperative and inoperative status of the system, as under such conditionsthe protective operative status and convenient employment of the systemhas a dependency upon the perfect and regular operation of a clerk workmecha ism or automatically-operatlug time device which in its nature isliable to disall'angement or operative disorder.

A leading object of my present invention and improvements is to overcomethe conditions above mentioned and obviate the employment of controllingtime mechanism for throwing off the alarm to permit access to theguarded structure or for governing the operative and inope ative statusof the alarm system, and to provide simple and improved means of certainand positive operative characteristics by which the operative status ofthe alarm circuits can be definitely and conveniently governed to permitauthorized access at any time to the guarded structure.

A further object of my present invention and llTlplOYCIDQIltS is toprovide a general burglar-alarm system which will possess advantages inpoint of simplicity, effectiveness. positive operation, convenience, andgeneral e ficiency, substantially as hereinafter set forthandparticularly pointed out in the claims.

Reference is had to the accompanying drawings, which show indiagrammatic representation the main parts of a 'burglaralarm systemembodying my improvements.

The type of burglar-alarm systems to which my improvements particularlyrelate involve primarily a guarded structure or main structure protectedby the burglaralarm system. The guarded structure, as herein referredto, may be the vault, safe, or other structure which it is desired toprotect in a bank or other building or apartment, or the building orapartment itself or a part thereof. The guarded structure is providedwith a door or other means of access thereto, and electrically protectedby the system in such manner that an attempt to gain entrance theretowill cause the actuation of an alarm. In connection with suchburglawalarm systems, the subject-matter of my present invention hasparticular relation to the means for permitting authorized access to themain guarded structure at any desired time and withoutactuating thealarm or disturbing the general operative protective status of the alarmsystem.

To this end, the main subject-matter of my present invention compriseseleetro-mechanical interlocking combination devices, which in theirrelative arrangement and construction and circuit connections enable thegoverning of the s stem so as to permit authorized access to tie guardedstructure without actuating the alarm or disarranging the operativeconditions of the system.

Referring to the drawings, 1 designates a combination lock device, whichin its general features of construction and operation of parts may be ofthe usual well-known types which are employed upon the doors of vaults,safes and other structures. Such combination lock devices employ alurality of tumblers, which are herein in icated at 2, the diagrammaticillustration of said tumblers .2 being an end or edge view thereof.These tumblers 2 are the loose tumblers 0f the combination construction,as will be readily understood. In my present invention, the combinationdevice 1 is not employed as a lock, in the usual sense of having boltsand fences and other locking parts, but is employed as a controllingmeans in association with a combination lock device which is operativefor locking purposes. The combination device 1 is preferably arranged ata convenient point upon the door or means of access to the vault, safe,or main guarded structure which is protected by the electricburglaralarm system, but it may be otherwise suitably arranged asdesired.

3 designates an ordinary combination lock, such as is usually employedupon the doors of vaults, safes, and other structures, and is employedfor lockin purposes. This combination lock 3 may e, in its main featuresof construction and operation of parts, of any usual or adapted type,and the diagramll ltltlC illustration shows the usual fence, 4, andbolt, 5, for locking the door, and the drawbolt, (i, these'being of theusual constructions well known in the art, and operat-' ing in the usualmanner. Such combination locks, as generally employed in the art,sometimes have their bolts thrown by a mechanical arrangement,'such as amechanical timelock, in lieu of, the arrangement for manually throwingthe bolts by means of a draw be t, and in such case the mechanicalarrangement is cmployedto serve the purpose of the drawbolt. \Vhile Ihave herein illustrated the combination lock 3 in its relation to adrawbolt, it will be understood that the means for throwing the bolts ofsuch loclr, in its employment in association with my present inventionand improvements, are not necessarily restricted to the use of amanually-operatable drawbolt, but that the bolts of the combination lock3 may be thrown by a mechanical arrangement such as a mechanicaltime-lock, or in any other suitable manner, when employed in associationwith my invention. The combination lock 3 is suitably and convenientlymounted upon the door of the vault, safe, or other structure to beprotected by the electric burglanalarm system, and l have herein shownit, in the diagrammatic illustration, in association with the usualfixed drawbolt frame, 7, the movable drawbolt bar, 8, and the(loggingblock, 9, the operation of which parts is as usual and will bereadily understood.

The combination controlling device 1 is in an operative sense anelectrical lock, and in its particular structural features as adapted.to my present invention and improvements it comprises a driver tumbler(shown in the diagrammatic illustration at 10) having a peripheralrecess, 11, adapted to receive a roller, 12, normally bearing upon theperiphcry of said tumbler and carried by an arm, 14, connected to a bar,15, suitably spring mounted, as at 16, and carrying a contact point, 17,operating with relation to a contact point or plate, 18. Theconstruction further comprises insulated sections or blocks, 19, uponthe periphery of the loose tumblers 2, and spring contacts, 20, bearingwith relation to the periphery of said tumblers.

The combination lock 3 is in an operative sense a mechanical lock forlocki ng purposes and IS in electrical connection with the electricalcombination lock 1. The lock 3, in its recess, 22, adapted to receiveeither one of two rollers, 23 and 24, respectively, bearing withrelation to the periphery of said tumbler. The roller 23 is carried upona rod, 25, con' ected to a bar, 26. suitably springmounted, as at 27,and carrying a contact point, 28, operating with relation to a contactplate or point, 29. The roller 24 is correspondingly carried by a rod,30, connected to a bar, 31, spring-mounted, as at 32, and carrying acontact point, 33, operating with relation to a contact plate or point,34. The mounting of the respective rollers 23 and 24 and their maincarrying bars 26 and 31 is preferably reversely-arranged, as shown.

At 35 and 36, respectively, are shown contact plates or blocks, whichare carried upon the movable drawbolt bar 8, the mounting of said platesupon the drawbolt bar being preferably by means of an insulated plate,37, secured to said bar. The contact 35 is of shorter extent than thecontact 36, and by the movement of the bar 8 these contacts areoperative with relation to spring contacts, 38 and 39, respectively,which are suitably mounted, preferably upon a portion. of the doorframe, 40' In the general burglaralarm system to which my improvementsespecially relate, the contacts just described constitute d-rawboltcontact means, the operation of which will be hereinafter set forth.

in the improved electrical burglar-alarm system there is also compriseda trip (shown in the diagrammatic illustration at 41) which is suitablymounted at any desired point upon the frame, 42, of the door of thevault, safe, or other structure to be protected. This trip is preferablyconstituted by a plate, pivotally mounted, as at 43, to operate withinthe door frame and through a slot or opening, 44, therein, in suchmanner that said plate will be raised to the position shown in thedrawings by action of the door, 45, when the latter is in normal closedposition, and will drop when the door is opened or withdrawn from withinthe door frame. Said plate 41 carries a contact point 46, adapted tocontact with a contact plate or contact point, 47, when the trip plate41 is released and drops from the position in which it is normally heldby the closed door.

The alarm 'of the burglar-alarm system is indicated at 48, and mayconsist of a gong device which is usually located in the protected alarmhousing or structure hereinbefore referred to. The battery of theelectrical alarm system is shown at 49, and the sys tem furthercomprises an automatic drop, shown at 50, and a test bell, shown at 51,these supplementary parts and other parts which may be comprised in thegeneral features of the alarm circuits being preferably arranged withinthe main guarded structure, which is the vault, safe, or other structureto be protected, as hereinbefore referred to.

The general circuits connecting the various parts of the electricalburglar-alarm system comprised in thesubject-matter of my presentinvention, may be arranged in any suitable or desired manner, and I haveherein shown one preferred arrangement of circuits which I will nowproceed to describe. From one side of the battery 49, a wire, 52,extends to electrical connection with the tumblers of the combinationelectrical lock device 1, this electrical connection being in practicepreferably through the metallic parts of said device 1, with which thetumblers are of course in metallic electrical circuit association. Awire, 53. extends from the wire 52 to the contact point 17 of the rollerdevice 12. From the other side of the battery 49, a wire, 54, extends.through the frame of the automatic drop and through the test bell 51, tothe short drawbolt bar contact 35. A wire, 55, extends from the wire tothe spring contact 38 which operates with relation to the short drawboltbar contact A wire, 56, extends, from the spring contact 39 whichoperates with relation to the long drawbolt bar contact 36, to thespring contacts 20 which operate with relation to the tumblers O andtheir insulated sections 19 of the electrical lock device 1. A wire, 57,extends from the long d-rawbolt bar contact: 36 to the contact 47 whichoperates with relation to the contact point 46 on the door trip plate 4.A Wire, 58, extends from the wire 57 to the coil of the automatic drop50, and from the contact point 59, of the automatic drop 50, a wire. 60,extends, through the main alarm 48, to the wire From the contact. point18 which operates with relation to the contact point 17 of the rollerdevice 12 of the electrical lock dciicc 1, a wire, 61, extends to thecontact 29 which opcratcs with relation to the contact point 28 ot' theroller device 23 of the combination lock dcvice 3, and from said contactpoint 28 a wire, 62, extends to the Wire 57. From the contact point 33of the roller device 21 of the combination lock device which operateswith. relation to the contact 3st. a wire. extends to the wire't'fi. andfrom said contact a Wire, 64. extends to the wire A wire. b5. extendsfrom the wire 56 to the contact point 46 of the door trip plate 41, byelectrical connection with said plate in any suitable manner.

The operation and advantages of my invcntion and improvements, inrelation to general electrical burglar-alarm for the protection ofvaults, safes, or other struc turrs, will be rcadily understood bythoscv skilled in the art. The d agrammatic illus tration of thedrawings shows the position of the contacts and the relativelyoperatingparts and the circuit conditions when the door of the vault or protectedstructure is closed or in normal position and locked, and in thepositions shown th-c alarm system con trolled by the operation of thecontacts is set in operative condition and ready tor actuation in caseof an attack upon the protected structure. Under the circumstances justindicated, if an unauthorixci'l person tampers with the combinationelectrical lock 'controlling device 1, before trying to ellcct accessthrough action upon the combination loch device 3 by removing theelectrical protcc tire status of the device 3, the turning of the drivertumbler of the cl ctrical controlling device 1 will causc the rollerdevice 12 to drop into the recess 11 of the tumbler and thus close thecontact 17 and 18 which is normally open.

Vt'ith relation to the various contacts, it w ill be understood that thecontact 28 and 20 is normally closed, the contact 33 and 3-1- isncrinally open, the contacts 35 and 9- and 36 and 39 are normally open,the contact -16 and 47 is normally open the contact 17 and 18 isnormally open. and the contact of the automatic drop 50 is normallyopen.

The closing of the contact l7 and l3 as above indicated will complete acircuit and cause an alarm to be -scunijlcd. as follows: from one sideof the battery 4 through the wires 52 and 53, through the contact 17 and19, through the wire 61, through the closed contact 2'3 and 29. throughthe wires (32 and 57, through the wire 58, through the automatic drop50, and through the wire 54, to the opposite side of the battery 49. Thecircuit thus conpleted through the autoi'uatic drop will cause thecontinuous actuation of the alarm 48 through its circuit conncctions bythe wire 60. he continuous alarm circuit thus established is as follows:from one side of the battery 49 through the wire 54, through the frameand closed contact '59 of the automatic drop. through the wire andacross the magneto bell-devicc 18, and through the wire to the otherside of the battery 49.

If, instead of first tampering with the combinati n electrical lochcontrolling device 1. the burglar or other unauthorized person tamperswith the combination lock device I), the actuation otthe tumbler :51will cause the roller 24 to drop into the recess 22 of said tumbler andclose the normallyopen contact 33 and 34, thus completing a circuit andcausing the alarm to he sounded. as follows: from one side of thebattery 4.) through the wire 52, through the tumblers 2 of theelectrical lock device 1, through the spring contacts 20, through thewire 56, through the wire 64, through the contact 33 and 3 through thewires 63 and 57, through the wire 58, through the automatic drop 50, andthrough the wire 54, to the opposite side of the battery 49.

Should an attack be made upon the door of the vault or protectedstructure. by blowing down the door or otherwise impairing its relationto the door frame at points hav ing the door trip 41, said trip would bere leased and thus close the normally open contact 46 and 47, whichwould complete a circuit and cause the actuation of the alarm, asfollows: from one side of the battery 49 through the wire 52, throughthe tumblers 2 and spring contacts 20, through the wire 56, through thewire 65, through the trip plate 11 and contact 46 and 47, through thewire 57, through the wire 58, through the automatic drop 50, and throughthe wire 54 to the opposite side of the battery 49.

Should an attempt in any manner he made to spring the drawbolts, whichwould bring the spring contact 39 in connection with the contact 36 onthe drawbolt bar, a circuit would be completed and an alarm soundedthereby, as follows: from one side of the battery 45) through the wire52, through the tumblers 2 and spring contacts 20, through the wire 56,through the contacts 39 and 36, through the wire 57, through the wire58, through the automatic drop 50, and through the wire 54-, to theopposite side of the battery 49.

The insulated sections or blocks 19 of the tumblers 2 of the combinationelectrical lock controlling device 1 are for the purpose of permittingthe insulation of the spring contacts 20 from said tumblers 2, after thecombination lock device 3 has been properly set to break thenormally-closed contact 28 and 29, the relative positional arrangementof said insulated sections 10 being adapted to this purpose and withrespect to the secret combination and the conditions of operationhereinafter described. Inthe operative arrangen'ient as herein shown,the contact 28 and 29 is normally in closed position, by reason of thefact that the roller 23 is operating upon the periphery of the tumbler21 in a direction away from the recess 22 of said t'un'iblrr. and itwill be understood that the rollcr 2t would drop into said recess andthllw close the normallyopencontact 33 and Lil before the roller 23could enter said reccss, in the operative actuation of the combinationloch device 3. These conditions are related to the features of myinvention and improvements by which the locking means may be at any timeoperated to enable the opening of the door of the protected struc turewithout causing an alarm to be sound I ed,'but this provision ofoperation can only be accomplished by an authorized person havingcognizance of the secret coinbination whereby authorized access to theprotected structure can be gained. For instance, the adjustment of thecombination lock device 3 is such that a secret combination will enablethe operation of the lock to permit the roller 23 to drop into thereccss 22 when the tumbler 21 is turned to the left from the positionshown in the diagrammatic illustration of the drawings, and theconditions are such that it would be neccssary to turn said tumbler tothe left and to stop at a definite secret combination whereby the recess22 will be directly under the roller 23. It will be understood that ifthe tumbler was first turned to the right, in tampering with thecombination lock, a eir cuit would be completed and the alarm actuatedby reason of the closing of the normally-open contact 33 and 34. But theop eration under the secret combination, by an authorized person havingcognizance thereof, to bring the recess 22 directly under the roller 23,would cause the opening of the normally-closed contact 28 and 29 andthus disconnect the combination lock device 3 from the alarm circuits.Then, under these conditions, the authorized person, in the furtheroperation of the locking means, can manipulate the combinationelectrical lock controlling device 1 to arrive at a definite secretcombination, of which he has cognizance. which will set the springcontacts 20 on the insulated sections or blocks 19 of the tumblers ofsaid device 1. This latter action of course takes the electrical currentconnections completclv from the combination lock device 3 and thedrawbolt bar con-- tacts 39 and 36 and the door trip device 41, and theauthorized person can thereafter manipulate the combination lockdef-rice 3 upon its regular locking combination and unlock and open thedoor in the usual manner without sounding the alarm and withoutdisturbing the general conditions of the burglar-alarm system which arenot related to the locking means and the opening and closing of theaccess door. The secret com bination herein set forth, for disconnectingthe locking means and door protective contacts from the electricalcurren connections, is of course entirely different from the regularcombination by which the locking means is operated to enable the unlocking and opening of the door. In pram tical usage, it is of coursenot necessary that. the same person have cogmizancc of the secretcombination whereby the r king means is disconnected from the eleotr; llcurrentconnecticns and the regular combinatiim for enabling theunlocking and opening of the do r. but these different combinations canbe respectively known. to two persons the presence of both of whichwould be required to enable the unlocking and opening of the door andaccess to the protected structure without actuating the alarm,

A further condition of the operative status of the electricalburglar-alarm protective system comprised in my present invention andimprovements is that. when the bolt of the combination lock 3 is thrown,by the usual operation of said lock, and the bolts which fasten the doorto the walls of the door opening and which are held by the drawboltbar-8 are released by means of the usual drawbolt handle, the movementof said drawbolt bar 8 either forward or backward causes the passage ofthe short drawbolt bar contact 35 under the spring contact 38 on thedoor frame. This completes a circuit during the period of time thecontact 35 is passing beneath the contact 38 in the movement of thedrawbolt bar. 8, and during this BI'lOd of time the test bell 51 will besoon ed. This sounding of the bell will serve as an indication that thebatteries are in gbod condition, and will also serve as an automatictest of the strength of the batteries. It will be understood that themovement of the drawbolt bar 8 only maintains this completed circuitcondition for a determined period of time, regulated by the length ofthe short drawbolt bar contact 35, as the spring contact 38 will passoff the ontact 35 and onto the insulated plate 37 in either direction,during the movement of the drawbolt bar 8. The completed circuit underthe conditions just mentioned, is as follows: from one side of thebattery 49 through the wire 52, through the wire 55, through thespring-contact 38, through the contact 35, and through the wire 54 andtest bell 51 and automatic drop 50, to the opposite side of the battery49. The operative status of the contacts 35 and 38 is also such that inclosing andlocking the door the test bell will continue to ring untilthe door and drawbolt bar have been brought to proper position, as onlythe proper throwing of the drawbolts will bring the contacts 35 and 3iuthe relative position in which they are out of contact, and thus theoperative status of the mechanism just described will serve as a. testfor assuring the proper clos ing and locking of the door.

In the preferred arrangement of the combination electrical lockcontrolling device 1 and the combination lock device 3, both of thesedevices may be suitably arranged to be carried by the same door of theprotected structure, but withinthe compass and intent of my inventionand improvements the conr bination lock device 3 could be mounted 0 ofthe u'oirctod structure and trically protected housing or structure,under which circumstances the electrical circuit connections between thedevices 1 and 3 would be contained in a protected cable such as isusually emplhyed in burglar-alarm systems of this character where anexposed connection is made between two separated parts of the system. Ifthe device 1 is located at a station away from the protected structure,its operative conditions would be controlled at that station, and thusthe control of the combination lock device 3, to enable the opening ofthe door of the protected structure and access thereto without actnatin;the alarm, would be governed from the station at which the device 1 waslocated. It will be understood that, when the controlling device 1 islocated at an alarm station away from the protected structure, a singledevice 1 could be adapted to protect a plurality of distant structureseither located adjacent each other or at various individual points andeach guarded by the combination lock device 3, by having the electricalconnections from the single controlling device 1 extend to all theseparate combination lock devices 3. Thus, the control of all of theelectrically protected combination lock devices 3 could be governed byan operator at a distant central station, who would have to set thecontrolling device 1 so that the sprin contacts 20 contacted with theinsulated blocks or sections 19 thereof before the combination 'locks 3of the distant protected structures could be operated to enable accesswithout actuating the alarm. Under the circumstances and conditions juststated, author: ized persons desiring access to the protected structureswould first notify the central station to properly set the controllingdevice 1, to enable their access to the Protected structure withoutactuating the alarm, or the .central station could operate thecontrolling device 1 at a predetermined and mutually understood timewhen access was to be permitted to the protected structure orstructures.

Various other modifications in the relative arrangement and operativestatus of the mechanisms comprised in my present invention andimprovements may also be employed. If desired, a mechanical time lockcould be employed with relation to either or both the combinationelectrical lock controlling device 1 and the combination lock device 3,to dog the same, as will be readily understood. i

I do not desire to be understood as limiting myself to the detailconstruction and arrangement of parts or circuits as herein shown anddescribed, as it is manifest that variations and modifications thereinmay be whir "'1 n th adaptation of my invcnn5 i .l,

invention and improvements. I therefore reserve the right to all suchvariations and modifications as properly fall within the scope of myinvention and the terms of the following claims.

Having thus described my invention, I claim and desire to secure byLetters Patent:

1. In an alarm system, an electric protecti ve aanm circuit, a structureprotected thereby, access means to said structure, locking meansgoverning said access means and in electrical connection with saidcircuit, said connection comprising ncans whereby unauthorized tamperingwith the locking means will cause the actuation of the alarm, and1nanually-opcratable means in electrical connection with said circuit,said last named connection comprising means whereby unauthorizedtampering'with said manuallyoperatable means will cause actuation of thealarm and means whereby authorized operation of said manually-operatablemeans will disconnect said locking means from its circuit connections toenable operation of the locking means without actuating the alarm.

2. In an alarm system, an electric protective alarm circuit, a structureprotected therebyaccess means to said structure, locking means governingsaid access means and in electrical connection with said circuit, saidconnection comprising means whereby unauthorized tampering with thelocking means will cause the actuation of the alarm, and supplementarymeans manually-operatable to cause actuation of the alarm and to controlthe circuit connections of said locking means so that authorizedoperation of the latter can be eftected without actuating the alarm.

3. In an alarm system, an electric protective alarm circuit, a structureprotected thereby, access means to said structure,

locking means governing said access means and in electrical connectionwith said circuit, said connection comprising means whereby unauthorizedtampering with the locking means will cause the actuation of the alarm,and supplementary meansin connection with said alarm circuit and inconnection with the circuit connections of said locking means with saidalarm circuit said supplementary means being manuallyoperatablc to causeactuation of the alarm and control the electrical connections of saidlocking means so that authorized operation of the latter can be effectedwithout actuating the alarm.

4. In an alarm system, an electric protective alarm circuit, a structureprotected thereby, access means to said structure, lock-v ing meansgoverning said access means and in electrical connection with saidcircuit, said connection comprising means whereby unauthorized tamperingwith thelocking means will cause the actuation of the alarm,supplementary manually-operatable means 5. In an alarm'system, anelectric protective alarm circuit, a structure protected thereby, accessmeans to said structure, a combination-lock mechanism governing saidaccess means and in connection with said circuit, said connectioncomprising means whereby unauthorized tamperin with saidcombination-lock mechanism Wlll cause the actuationof the alarm, asupplementary combination mechanism in connection with said alarmcircuit, said last named connection comprising means wherebyunauthorized tampering with said supplementary combination mechanismwill cause the actuation of the alarm, and electrical connectionsbetween said supplementary combination mechanism and saidcombination-lock mechanism, said last named connections comprising meanswhereby authorized actuation thereof will enable operation of thecombination-lock mechanism without actuating the alarm.

6. In an alarm system. an electric protec tive alarm circuit, astructure protected thereby, access means to said structure, acombinationdock mechanism governing said access means and comprisingtumblers. an automatic switch mechanism governed by the tumblers of saidcombination-lock mech' anism and in connection with said alarm circuit,whereby unauthorized tamperin with the combination-lock mechanism willeause'the actuation of the alarm, a supplementary combination mechanismcomprising tumblers, an automatic switch mechanism governed by thetumblersof said supplementary combination mechanism and in connectionwith said alarm circuit whereby unauthorized tampering with saidsupplementary combination mechanism will cause the actuation of thealarm, and circuit connections between said supplementary combinationmechanism and said combination-lock mechanism, said last namedconnections comprising means whereby authorized actuation thereof willenable operation of the combination-lock mechanism without actuating thealarm.

7. In an alarm system, an electric protec: tive alarm circuit, astructure protected thereby, access means to said structure, acombination-lock mechanism governing said access means, an automaticswitch mechanism controlled by the moving parts of said combination-lockmechanism and in connection with said alarm circuit, wherebyunauthorized tampering with said combinationlock mechanism will causethe actuation of the alarm, and means for so controlling the circuitconnections ofv said combination-lock "access. means, circuitconnections between.

said combination-lock mechanism and said protective alarmv circuit, andmeans operatable by said combination-lock mechanism for controlling itscircuit connections, said means comprisingdevices for maintaining thecircuit; connections open when the combination-lock mechanism isoperated on the true combination and for closing the circuit connectionswhen the combinationlock mechanism is tampered with.

9. In a burglar-alarm system, a structure tobe guarded, access means tosaid structure, an electric alarm circuit protecting said-structure, alock mechanism controlling the means of access to said guardedstructure, circuit connections between said lock mechanism and saidprotective alarm cir 'cuit,- said connections comprising means wherebyunauthorized tampering with said lock mechanism will cause the actuationof the alarm, and means exterior ofsaid pro tected structure, andgoverning said lock mechanism to cause actuation of the alarm in oneorder of movement and in another order of movement to disconnect saidlock mechanism fromsaid electrical connection to permit authorizedoperation thereof without actuatin the alar 10. ,In a urglar-alarmsystem, a structure to be guarded, access means to said structure, anelectric' alarm circuit protecting said structure, a lock mechanismcontrolling the means of access to said guarded structure, circuitconnections between said lock mechanism and said protective alarm'circuit, said connections comprising means whereby unauthorizedtampering with said lock mechanism will cause the actuation of thealarm, and manual]y-operatable means exposed exteriorly upon saidprotected struc ture and operatable in one order of move ment to causeactuation of the alarm and in another predetermined order of movement toso control the electrical connection of the locking mechanism thatauthorized operation thereof can be effected without actuating thealarm.

11. In an alarm system, an electric protective alarm circuit, acombination switch mechanism in connection with said alarm circuit andoperatable to cause the actuation of the alarm, a combination switch andlocking mechanism in connection with said alarm'circuit and with saidfirst combination switch mechanism and operatable' to cause theactuation of thealarm, and manu ally-operatable means governing saidcombination mechanisms to cause actuationof the alarm in one order ofmovement and in another predetermined order of movement to disconnectsaid combination mechanisms from the alarm circuit to permit authorizedopening of the combination locking mechanism without-actuating thealarm.

12. In a burglar-alarm system, a structure to be guarded, an electricalarm circuit protecting said structure, a coml'iination' switchmechanism in connection with said alarm circuit and operatable tocausethe actuation 35 of the alarm, a combination switch and lockingmechanism inc'losed within guarded structure and in connection with saidalarm 'circuit and with said first combination switch mechanism andoperatable'to cause the actuation of the alarm, and manuallyoperatablcmeans exposed exteriorly of said protected structure and governing saidcombination mechanisms to cause actuation of the alarm in one order ofmovement and in another predetermined order of movement to disconnectsaid combination mechanisms from the alarm circuit to permit authorizedopening of the combination locking mechanism without actuating'thealarm.

13. In an, alarm system, an electric protective alarm circuit, acombination switch mechanism in connection with said alarm circuit andoperatable to cause the actuation of the alarm, a combination'switch andlocking mechanism in connection with said alarm circuiband with saidfirstcombination switch mechanismand operatable to cause the actuationof the alarm, means governing said combination mechanisms to causeactuation of the alarm in one order of movement and in anotherpredetermined order of movement to disconnect said combinationmechanisms from the alarm circuit to permit authorized opening otthecombination locking mechanism without actuating the alarm, and meansfor'indicating whether the locking mechanism has been returned to normallocking action and is'thus set for its operative action to causeactuation of the alarm, said means operating when the locking mechanismis operated to return it to locking position.

14. In an alarm system, an electric protec tive alarm circuit, acombination switch mechanism in connection with said alarm circuit andoperatablc to cause the actuation of the alarm, a combination switch andlocliing mechanism in connection with said alarm circuit and with saidfirst combination vmechanism in connection with said test alarm circuitand operating to actuate the same to indicate whether the lockingmechanism has been returned to normal locking action and is thus set forits operative action to cause actuation of the alarm, said supplementaryswitch mechanism being operative when the locking mechanism is operatedto return it to locking position.

15. In an alarm system, an electric protective alarm circuit, astructure protected thereby, access means to said structure, acombination switch and locking mechanism governing said access means andin connection with said alarm circuit and operatable to cause theactuation of the alarm, means controlling said combination switch andlocking mechanism to enable authorized operation thereof withoutactuating, the alarm, ,a'" movable part comprised in the lockingmechanism and controlling the op-" erative locking action thereof, anauxiliary test alarm circuit, a circuit contact carried by said movablepart and in connection with said test alarm c1 rciut, and a fixedcontact operatable with relation to said mow able circuit-contact and inconnection with the .test alarm circuit, whereby said contacts willoperate to cause the actuation of the test alarm circuit to indicatewhether the locking mechanism has been returned to normal locking actionand is thus set for its operative action to cause the actuation of thealarm, said contacts operating when sai:l mo\'able part of said lockingmechanism is operated to return the locking mechanism to lockingposition.

16. In an alarm system, an electric protective alarm circuit, astructure protected iherehy,access means to said structure, acombination switch mechanism in connection with said alarm circuit andoperatable toc'anse the actuation of the alarm, a combination switch andlocking mechanism governing said access means and in connection withsaid alarm circuit and with said first combination switch mechanism andoperatable to cause the actuation of the alarm, means for disconnectingsaid combination mechanism: from the alarm circuit to permit authorizedopening of the combination locking mechanism without actuating thealarm, a movable partas at 8-comprised in the locking mechanism andcontrolling the operative locking afction thereof, circuit contactsas at35 and 36carried by said mow able part, and stationary circuit contactsas at 38 and 39 -adapted for contact with said movable circuit-contacts,said circuit contacts 36 and 2 9 being relatively arranged in electricalconnection with said protective alarm circuit" and with said combinationmechanisms, an auxiliary test alarm circuit, said circuit contacts 35and 38 being relatively arranged in electrical connection with said testalarm circuit, substantially as set forth, whereby said movable part andthe contacts 35 and 3S and circuit connections thereof constitute meansto cause the actua- -tion of the test alarm circuit to indicate whetherthe locking mechanism has been returned to normal locking action and isthus set for itsoperative action to cause the actuation of the alarm,and said movable part and the contacts 36and 39 and circuit connectionsthereof constitute means to cause the actuation otthe main protectivealarm circuit when said first combination switch mechanism hasnot been'set in its operative position to establish the normal electricalconnectionv of the combination. locking mechanism with the mainprotective alarm circuit, said contacts operating when said movable partof the locking mechanism is operated to return the locking mechanism *tolocking position.

17. In a burglar-alarm system, a structure to be guarded, access meansto said structure, an electric alarm circuit protecting said structure,a locking mechanism governing said access means and in connection withsaid alarm circuit, said connections comprising means wherebyunauthorized tam-g pering with the lockingmechanism will cause theactuation of the alarmya movable part in association with said lockingmechanism .7

and controlling the operative locking action thcreoef, means controllingthe circuit connections of said locking mechanism to enable authorizedoperation thereof and of said movable part without actuating the alarm,and a supplementary automatic switch Vmechanism in connection with saidalarm circuit and controlled by said mov able part, said supplementaryswitch mecha uism and circuit connection constituting means to cause theactuation of the alarm by movement of said part independent of FREDERICKARNOLD SMITH.

